reflect

Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. The typical use is to take a value with static type interface{} and extract its dynamic type information by calling TypeOf, which returns a Type.

A call to ValueOf returns a Value representing the run-time data. Zero takes a Type and returns a Value representing a zero value for that type.

See "The Laws of Reflection" for an introduction to reflection in Go: https://golang.org/doc/articles/laws_of_reflection.html

API

    func Copy(dst, src Value) int
    func DeepEqual(x, y interface{}) bool
    func Swapper(slice interface{}) func(i, j int)

type ChanDir

    func (d ChanDir) String() string

type Kind

    func (k Kind) String() string

type MapIter

    func (it *MapIter) Key() Value
    func (it *MapIter) Next() bool
    func (it *MapIter) Value() Value

type Method
type SelectCase
type SelectDir
type SliceHeader
type StringHeader
type StructField
type StructTag

    func (tag StructTag) Get(key string) string
    func (tag StructTag) Lookup(key string) (value string, ok bool)

type Type

    func ArrayOf(count int, elem Type) Type
    func ChanOf(dir ChanDir, t Type) Type
    func FuncOf(in, out []Type, variadic bool) Type
    func MapOf(key, elem Type) Type
    func PtrTo(t Type) Type
    func SliceOf(t Type) Type
    func StructOf(fields []StructField) Type
    func TypeOf(i interface{}) Type

type Value

    func Append(s Value, x ...Value) Value
    func AppendSlice(s, t Value) Value
    func Indirect(v Value) Value
    func MakeChan(typ Type, buffer int) Value
    func MakeFunc(typ Type, fn func(args []Value) (results []Value)) Value
    func MakeMap(typ Type) Value
    func MakeMapWithSize(typ Type, n int) Value
    func MakeSlice(typ Type, len, cap int) Value
    func New(typ Type) Value
    func NewAt(typ Type, p unsafe.Pointer) Value
    func Select(cases []SelectCase) (chosen int, recv Value, recvOK bool)
    func ValueOf(i interface{}) Value
    func Zero(typ Type) Value
    func (v Value) Addr() Value
    func (v Value) Bool() bool
    func (v Value) Bytes() []byte
    func (v Value) Call(in []Value) []Value
    func (v Value) CallSlice(in []Value) []Value
    func (v Value) CanAddr() bool
    func (v Value) CanInterface() bool
    func (v Value) CanSet() bool
    func (v Value) Cap() int
    func (v Value) Close()
    func (v Value) Complex() complex128
    func (v Value) Convert(t Type) Value
    func (v Value) Elem() Value
    func (v Value) Field(i int) Value
    func (v Value) FieldByIndex(index []int) Value
    func (v Value) FieldByName(name string) Value
    func (v Value) FieldByNameFunc(match func(string) bool) Value
    func (v Value) Float() float64
    func (v Value) Index(i int) Value
    func (v Value) Int() int64
    func (v Value) Interface() (i interface{})
    func (v Value) InterfaceData() [2]uintptr
    func (v Value) IsNil() bool
    func (v Value) IsValid() bool
    func (v Value) Kind() Kind
    func (v Value) Len() int
    func (v Value) MapIndex(key Value) Value
    func (v Value) MapKeys() []Value
    func (v Value) MapRange() *MapIter
    func (v Value) Method(i int) Value
    func (v Value) MethodByName(name string) Value
    func (v Value) NumField() int
    func (v Value) NumMethod() int
    func (v Value) OverflowComplex(x complex128) bool
    func (v Value) OverflowFloat(x float64) bool
    func (v Value) OverflowInt(x int64) bool
    func (v Value) OverflowUint(x uint64) bool
    func (v Value) Pointer() uintptr
    func (v Value) Recv() (x Value, ok bool)
    func (v Value) Send(x Value)
    func (v Value) Set(x Value)
    func (v Value) SetBool(x bool)
    func (v Value) SetBytes(x []byte)
    func (v Value) SetCap(n int)
    func (v Value) SetComplex(x complex128)
    func (v Value) SetFloat(x float64)
    func (v Value) SetInt(x int64)
    func (v Value) SetLen(n int)
    func (v Value) SetMapIndex(key, val Value)
    func (v Value) SetPointer(x unsafe.Pointer)
    func (v Value) SetString(x string)
    func (v Value) SetUint(x uint64)
    func (v Value) Slice(i, j int) Value
    func (v Value) Slice3(i, j, k int) Value
    func (v Value) String() string
    func (v Value) TryRecv() (x Value, ok bool)
    func (v Value) TrySend(x Value) bool
    func (v Value) Type() Type
    func (v Value) Uint() uint64
    func (v Value) UnsafeAddr() uintptr

type ValueError

    func (e *ValueError) Error() string